Abstract: A video display device has a CRT, a deflection yoke and control means for producing a compensation current. A coil cover has a coil winding element and is attached to a front part of the yoke. A conductor is wound around and supported by only one surface of the coil winding element. A control means is coupled to a first and a second ends of the conductor.

Abstract: A television system which selectively receives additional information multiplexed in a video-signal source different from and other than a video-signal source currently being watched. A video signal V7 supplied to a CCD/EDS data extractor 7 is selected independently of a video signal V5 for a main screen of a CRT 10 or a video signal V6 for an auxiliary screen of the CRT 10 displayed by a PinP (PoutP) function. Accordingly, captions to be displayed are not limited to additional information multiplexed in the video signal V5 for the main screen displayed on the CRT 10. As a result, additional information multiplexed in a video signal for the auxiliary screen other than that for the main screen or multiplexed in an external video signal V2 can also be displayed as well.

Abstract: In a television receiver having a pair of speakers provided at the right and left sides of its image display portion, respectively, for reproducing the stereo audio signal by the speakers, one of the pair of speakers is constituted by the speaker unit for reproducing the middle and high frequency range of the stereo audio signal, and the other of the pair of speakers is constituted by the speaker unit for reproducing all frequency range of the stereo audio signal which is superior in reproduction characteristics of the low frequency range audio signal than that of the speaker unit for reproducing the middle and high frequency range.

Abstract: A method and apparatus for creating an optical disk mother or stamper wherein the number of processing steps is greatly reduced from the prior art methods. In particular, the present invention involves directly forming a mother or stamper by direct laser ablation of a conductive metal substrate. More specifically, a stream of coded digital information (for example, representing the content of an encyclopedia in the case of CD ROM or a classical music collection in the case of CD audio) is converted into a corresponding plurality of pits and lands in the conductive metal substrate by electronically switching the beam of a first laser on and off via an electro or acusto-optic modulator (EOM/AOM) in response to the digital information. As a result, selective portions of the conductive substrate are either ablated (in the case where the laser is on) thereby directly creating the pits, or the substrate is left unaltered (in the case where the laser is off) thereby creating lands.

Abstract: A demagnetizer for display unit which allows to reliably demagnetize without bothering the user thereof. A start pulse a1 is sent out from a timer 21 to an activating pulse generating circuit 22 in every predetermined time t1 to sent out an activating pulse b. Receiving the activating pulse b, a demagnetizing current generating circuit 23 sends out a demagnetizing current I to a degauss coil 1 to demagnetize a magnetized shadow mask (or aperture grille). The activating pulse b is also supplied to a reset pulse generating circuit 24 to send out a reset pulse c to the timer 21. Thereby a counting of the timer 21 is reset and the start pulse a1 is sent out as the predetermined time t1 elapses. This demagnetizer allows to carry out the demagnetizing action without bothering the user.

Abstract: An improved squeegee holder for screen printing. A squeegee with a diamond or square shaped portion is clamped between two clamping plates inside V-shaped grooves in the clamping plates. Corner relief portions are provided within the clamping plates so that the corners not in use are not damaged. The clamping plates are aligned by two alignment pins and screwed together by a threaded rod with a handle. A spring surrounds each of the alignment pins urging the two clamping plates apart so that they separate when the screw handle is loosened.

Abstract: A device for preventing contamination of a clean room during the performance of unclean work. Wall members are provided to be connected in series, to surround and isolate the unclean work. Each wall member includes an interlocking receiving channel that can be slipped over the frame member of an adjacent wall member. This allows the wall members to be connected in series. Each wall member also has wedging means that allows the wall member to be tightly wedged between the ceiling and floor of the clean room, to prevent contaminants produced by unclean work from traveling from the work area to the rest of the clean room. If the unclean work includes making an opening in the wall of the clean room, a similar arrangement can be constructed on the opposite side of the wall, if that area also needs to be kept clean.

Abstract: A signal transmitting and receiving apparatus includes a transmitting circuit block which has a carrier signal supplying portion for supplying first and second carrier signals having the same frequency and a relative phase angle difference of substantially ninety degrees to be used for producing a transmissible digital phase-modulated signal. A receiving circuit block in which received digital data are obtained is based on a received digital phase-modulated signal, wherein the carrier signal supplying portion comprises a carrier signal generator for generating an additional carrier signal having a frequency twice as high as the frequency of each of the first and second carrier signals. A first flip-flop circuit produces the first carrier signal based on the additional carrier signal. A second flip-flop circuit produces the second carrier signal based on the additional carrier signal having been phase-inverted.

Abstract: A CCD sensor 3 generates video signals in response to an incident light representing an image of an image. In accordance with a video signal supplied from a focusing region of the CCD sensor, a first control section including a focusing control unit 9 generates a focus control signal. In response to the focus control signal, a drive circuit 10 and a motor 1 control an imaging lens 2 so as to focus the lens 2 on the image. Further, in response to a motion vector signal outputted from a motion vector detecting unit 6, a second control section including a distance measurement region control unit 7 controls a position of the focusing region so that the focusing region tracks motion of the image of the object. In addition, a view-finder 11 displays the video signals supplied from the CCD image sensor 3 and a cursor representing the focusing region.

Abstract: In an upper and lower pincushion distortion correcting circuit, so-called "cloak distortion" and "vertical intermediate-pincushion distortion" are corrected. A variable voltage source is connected to one end of a secondary winding of a transformer magnetically coupled with a primary winding thereof series-connected to a vertical deflection coil. A capacitor is connected between the other end of the secondary winding and the ground, and a series circuit constructed of a coil and a switch is connected in parallel to this capacitor. The so-termed "cloak distortion" is corrected by varying a resonance frequency of a sawtooth-shaped voltage in the horizontal scanning period, while an ON-period of the switch is controlled. Also, the "vertical intermediate-pincushion distortion" is corrected by varying an S-value of the sawtooth-shaped voltage in the vertical scanning period, while the source voltage of the variable voltage source is changed.

Abstract: An automatically answerable telephone apparatus comprises a control unit having a rewritable memory for storing control data for automatically responding operation and operative to control a line signal processor and a recording and reproducing device, a writable non-volatile memory, a power source for supply a power supply voltage, a capacitor connected for holding the power supply voltage, and a power failure detector, wherein the control unit is operative, with the power supply voltage discharged by the capacitor to remove operating portion other than the control unit and the writable non-volatile memory from the power source and to transfer the control data for automatically responding operation from the rewritable memory to the writable non-volatile memory for preserving the control data when power failure occuring in the power source is detected by the power failure detector.

Abstract: In a monitor apparatus for a television system, a dynamic range of a brightness level of an image quality is widened, and an image very similar to a picture of a movie film is represented on the monitor apparatus. With employment of the YM function for performing the half blanking process by controlling the gain of the video processor, for instance, when an image quality mode such as "theater" mode is selected, the video processor outputs such a control signal that the overall picture period becomes an H level (namely, YM function is turned ON). In the video processor into which such a control signal is inputted, the gain control is carried out. The video signal outputted from the video processor owns such a waveform that the half blanking process has been executed over the entire picture period. The brightness of the overall image can be lowered by this YM function.

Abstract: A laser beam generator for making wavelength conversion automatically controls the length of an external resonator of a laser source to perform wavelength conversion at a high efficiency by pulling-in a servo using a resonator length error signal and a reflected light signal. A sample-and-hold circuit is used to detect the error signal from the detected light signal which is reflected from the external resonator.

Abstract: The present invention provides a contrast control circuit capable of controlling the contrast even if the back porch is comparatively short. The contrast control circuit comprises monostable multivibrators (24, 26) which provides a background pulse and a reference pulse alternately, respectively, a switch (SW1) which clamps a video signal while the background pulse is HIGH so that the potential of the pedestal level is zero on an (N+1)th horizontal scanning line, and a switch (SW2) samples the leading edge of a reference pulse inserted in the video signal while the reference pulse is HIGH on an nth horizontal scanning line.